Usage Tips:Flymo Fly021 Compatible Double Autofeed Trimmer Strimmer Spool & Line (4-Pack) s12121088Pack Of 4 Spool and LinesQuality non partFits flymo double auto feed electric line trimmersDouble feedReplaces FLY021FitsFlymo 25 (9648581-62), 250 DX, 250 Plus Twin, 300 DX, Contour (9648589-25), Contour (Power +) 500 EIT250 (9648593-25), Contour (Power +) 700 EIT300 (9648595-25), Contour 500XT (9666769-01), Contour 500XT CTXT25 (9669524-01), Contour XT MCXT25 (9669523-01), Mini Trim, Mini Trim Auto, Mini Trim Auto ET23+DX (9648578-25), Mini Trim Auto Plus XT, Mini Trim Auto ST (9669520-62), Mini Trim Auto XT, Mini Trim Auto+ ET23DX (9648585-25), Mini Trim Contours XT (9669253-01), Minitrim Auto Plus (9648579-25), Multi Trim, Multi Trim 250, Multi Trim 250 D, Multi Trim 250 DX, Multi Trim 250 Plus Twin (9648550-25), Multi Trim 300, Multi Trim 300 DX, Multi Trim 300 Twin (9648555-25), Power Trim 500, Power Trim 500 SET250 (9648596-25), Power Trim 500XT PTXT25 (9669526-01), Power Trim 700, Power Trim 700 SET300 (9648597-25), Power Trim PWT23 (9648641-25), Revolution 2000 (Twin) (9648574-25), Revolution 2000 (Twin) MET230 (9648553-25), Revolution 2300 (Twin) (9648575-26), Revolution 2300 (Twin) MET230 (9648553-26), Revolution 2500 (Twin), Speedi-Trim STXT25 (9669790-01) and Twist &39;N&39; Edge (9648581-25)